Important Words for Bridges

Bridges are essential structures that help connect different areas separated by rivers or canyons. Understanding the various components that make up a bridge is crucial in ensuring their stability and safety. This article highlights some of the

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PowerPoint presentation about 'Important Words for Bridges'. This presentation describes the topic on Bridges are essential structures that help connect different areas separated by rivers or canyons. Understanding the various components that make up a bridge is crucial in ensuring their stability and safety. This article highlights some of the. The key topics included in this slideshow are . Download this presentation absolutely free.

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Slide1Bridges

Slide2Important Words• Span: the distance between two bridge supports (column, tower, canyon walls…) • Abutment: a.  The part of a structure that bears the weight or pressure of an arch. b.  A structure that supports the end of a bridge. c.  A structure that anchors the cables of a suspension bridge. • Girder: a beam, made of steel, wood, or reinforced concrete, used as a main horizontal support in a building or bridge – can be a box girder or truss girder

Slide3More Important Words• Compression: a force that acts to compress or shorten the thing it is acting on. • Tension: a force that acts to expand or lengthen the thing it is acting on. http://www.howstuffworks.com/bridge.htm

Slide4Beam Bridge• A rigid horizontal structure that is resting on two piers, one on each side. Load Compression Tension Reaction Force Reaction Force http://www.brantacan.co.uk/starterpages.htm

Slide5Beam Bridge• Typical Span Lengths:  10m - 200m • World's Longest: Ponte Costa e Silva, Brazil • Total Length:  700m • Center Span:  300m

Slide6Truss Bridge• Supporting lattice work added to many types of bridges. Trusses are skeletal structures made up of many small beams (normally in the shape of triangles).  As the size of a beam bridge increases, so must the size of the truss

Slide7Cantilever Bridge• Cantilever bridges are a modified form of beam bridge,  with the support being placed not at the end, but somewhere in the middle of the span. A cantilever is a structure or beam that is unsupported at one end but supported at the other, like diving boards.  http://www.richmangalleries.com/cantilever_bridges.htm

Slide8Forces in a Truss Bridge

Slide9Truss Bridge• Typical Span Lengths:  40m - 500m • World's Longest:  Pont de Quebec • Total Length: 863m • Center Span: 549m www.sepaq.com/Photos/J380/batPontQuebecC.jpg

Slide10Arch Bridge• An arch bridge is a semicircular structure with abutments on each end. The arch naturally brings the weight (a force) of the load from the roadway to the abutments. Used by the ancient Romans.  Can be made out of brick or stone. Load Compression Reaction Force http://www.matsuo-bridge.co.jp/english/bridges/index.shtm

Slide11Arch Bridge• Typical Span Lengths:  40m - 150m • World's Longest:  New River Gorge Bridge, U.S.A. • Total Length: 924m • Center Span: 518m

Slide12Suspension Bridge• The deck of the bridge is held up by cables that are strung across the water or canyon.  In modern suspension bridges, there are two towers over which the main cables are strung.  Numerous vertical or hanging cables (rods) support the road and are attached to the main cables. Thus, the towers are supporting the majority of the road deck’s weight.  The main cables must be anchored on either end of the bridge. Load Compression Reaction Force Tension http://www.brantacan.co.uk/starterpages.htm

Slide13Suspension• Typical Span Lengths:  70m - 1,000m+ • World's Longest: Akashi Kaikyo Bridge, Japan • Total Length: 3,911m • Center Span: 1,991m www.bergen.org/.../2002/wp_bridge/akashi.jpg

Slide14Cable Stayed Bridge• A continuous beam with one or more towers built above piers. From these towers, cables stretch down diagonally (usually to both sides) and attach to the girder to support the bridge deck. The cables can all attach at the top of the tower (fan) or at various points along the tower (harp). Load Tension Compression Reaction Force http://www.brantacan.co.uk/starterpages.htm

Slide15Cable Stayed• Typical Span Lengths:  110m - 480m • World's Longest: Tatara Bridge, Japan • Total Length: 1,480m • Center Span: 890m www.kawadaken.co.jp/jigyo/image/04_tatara.jpg